Rocket Engine Modules
10
H|0|propmod|Propulsion Module|75|91|
G|0|22n|22 newtons|207|216|
G|0|1n|1 newton|268|275|
H|0|nav|Navigation Team|361|375|
G|0|monop|mono-propellant|620|634|
G|0|hydra|hydrazine|683|691|
G|0|canted|canted|486|491|
A|1||large thruster|168|181|175,45,
A|3||smaller thrusters|237|253|30,153,247,91,387,153,
A|2||two stern-facing thrusters|446|471|175,45,247,91,
    Pictured here is one of the four Rocket Engine Modules mounted on the Propulsion Module. Each module consists of a large thruster and three smaller thrusters. The large thruster can generate a force of 22 newtons, while each of the smaller thrusters develop only 1 newton. By firing thrusters in different combinations and for varying lengths of time, the Navigation Team can change the orientation and orbit of the spacecraft. Note how the two stern-facing thrusters are slightly canted; they are aligned with the pre-launch center of mass of the spacecraft to minimize unwanted spin when fired. The thrusters are mono-propellant units which operate by expanding and expelling hydrazine from the main and auxiliary propellant tanks.
